package com.MusicWeb.servlet;

import com.MusicWeb.entity.Music;
import com.MusicWeb.service.UsermusicService;
import com.google.gson.Gson;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

@WebServlet("/music/column")
//todo: 查询全部音乐

//http://localhost:8080/music/column
//http://120.79.191.86:8088
//http://120.79.191.86:8088/music/column
public class MusciColumnServlet extends HttpServlet {
    UsermusicService usermusicService=new UsermusicService();
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        List<Music> list=usermusicService.SelectMusic();
        if (list!=null) {
            // 设置返回的数据为json对象
            resp.setContentType("application/json;charset=utf-8");
            // 把实体转换为json，返回给前端
            String str = new Gson().toJson(list);
            resp.getWriter().print(str);
        }
    }
}
